i'll be going to the dyno in a while once the vafc goes in, but for now here's what i've got :



this is from an OBD2 datalogger, using the stock O2 sensor (before the cat)

there seems to be some difference of opinion out there on what the values from the O2 sensor correspond to in terms of a/f ratio. can anyone fill in the blanks on the right side, or just comment in general if i'm running lean?

the motor is a supercharged (6psi) H22A.

 

Try aiming for .88 volts or so. That dip that u see, u might want to richen it up with the vafc or get bigger injectors. U r not running lean, but u are not really runnin a safe air/fuel mixture.
EVIL